[1] Lamourette was born in Frevent, Nord-Pas-de-Calais, in the Kingdom of France on 31 May 1742 to a family of humble artisans.
In 1772 he was appointed Professor of Philosophy at the Vincentian seminary in Metz, Burgundy.
[2][3] From 1783, he lived in Paris, and published his own works, believing that "religious vows should not lead to civil death".
He promoted religious tolerance and wanted to reduce the privileges of the high priesthood, a problem that would lead to the French Revolution in 1789.
Lamourette preached for "Christian democracy" and is famous for inventing the "Lamourette kiss" (fr), a fraternal embrace in which he sought to do away with all disputes between the parties in the Legislative Assembly while representing Rhone-et-Loire.